Final answer:
The statement that the focus is a break in the Earth's crust is FALSE. A focus is the origin point of seismic waves beneath the surface during an earthquake, while a fault is a break or crack in the Earth's crust where movement can occur.
Step-by-step explanation:
The term 'focus' refers to the point below the Earth's surface where seismic waves originate during an earthquake. This point is not the same as a 'fault', which is a crack or break in the Earth's crust along which slippage or movement can take place, often accompanied by seismic activity. Therefore, the statement that a focus is a break in the Earth's crust is FALSE. A fault can sometimes lead to the focus point of an earthquake, but they are not synonymous terms.